Minerals

Calcium

More than bones: calcium regulates your heartbeat, muscles, and nerves.

~44% of the US population does not meet calcium requirements from food alone

Why it matters for longevity

Calcium is the most abundant mineral in the body, essential for bone density, muscle contraction, nerve signaling, and blood clotting. Adequate calcium intake throughout life reduces osteoporosis risk. However, excessive supplementation without adequate K2 and magnesium may increase arterial calcification risk. The key is getting calcium from food sources and maintaining the cofactor balance.

How much you need

RDA

1,000mg for adults 19-50, 1,200mg for women over 50 and adults over 70

Optimal

Longevity researchers suggest 1,000-1,200mg from food sources, paired with vitamin D, K2, and magnesium for proper utilization.

Signs you might be low

  • Muscle cramps, especially at night
  • Brittle nails
  • Numbness or tingling in fingers
  • Dental problems

Best food sources

FoodPer serving
Sardines with bones (3 oz)325mg
Yogurt, plain (1 cup)415mg
Kale, cooked (1 cup)177mg
Cheese, cheddar (1 oz)200mg
Tofu, calcium-set (1/2 cup)253mg

Key research

Bolland MJ et al. (2015). Calcium intake and risk of fracture: systematic review. BMJ, 351, h4580.

Track your calcium with Biohack

Every meal scored for longevity. 23 nutrients tracked automatically. AI coaching to close your gaps.

← All nutrients

Related articles